$12.99 (as of 23/12/2017 02:14 PST details )
Features:
- Works with Xbox 360 wireless controllers
- Play six hours on one charge
- Replaces AA Batteries
- Charges while you play and while Xbox is in standby mode
- Please charge battery for 8 hours prior to first use. Optimal battery life will be achieved after 2 3 rounds of charging.